Although I have no objection to a "right to try", it is probably not worth spending a lot of time discussing it because of how rare it is that there are no good safe responses to a desperate medical situation, but there is a dangerous one with a decent chance of success.

The two chronically-ill friends I knew who put their chips on a drastic cure ended up dying pretty quickly from the cure. Neither even had a terminal illness, at least not one that would kill them any year soon: they just wanted to stop feeling miserable and to regain the ability to get stuff done.